Improvement in tinman s machine



@anni @twine CHARLES BROMBACHER, 0F TARRYTOWNNEW YORK.

Letters Patent No. 101,57 7 dated Aprill 5, 1870.

IMPROVEMENT IN TINMAN'S MACHINE.

The Schedule referred to in these Letters Patent and making part of thesame To all whom itmay concer/n Yof New York, have invented anImprovement in Tininans Machines, and the following is declared to be acorrect description ofthe same.

This machine is for bend-ing up the edges of sheet metal and 'insertingthewire, and performing other work usual in this class of tinniansmachinery.

I make use of a case that is constructed so as to exclude dust and dirt,and small pieces of sheet metal and foreign substances from the gearsand journals, and to keep the oil-holes free from dirt.

I also place the center, upon which the upper shaft swings, on thelevel, or nearly so, of the points of contact of the rollers, so thatthe upper roller may swing or lift nearly vertically off the lowerroller.

In machines of this class the sliding box of the upper shaft is usuallyacted upon by a screw, that requires, generally, two or three turns inentering and releasing the work.

I effect this operation by on'e movement of a swinging lever, so thatbut little time is consumed, and the operation is very much facilitated.

In the drawing- Y Figure 1 isa vertical section, longitudinally, Qt' theshafts, and

Figure 2 is a cross-section, at the line a: a'.

The lower shaft a is provided with the roller b at one end, and thecrank-handle at the other end.

This shaft is passed into journal-boxes, formed in the case d. I findthat bushings and separate boxes are not required. I therefore form thebearings for said shaft by holes bored through the case d.

The gear-wheel f is fastened upon the shaft d by a screw or key, and acollar, g, outside of the oase, pre vents end motion in the shaftet.

The shaft h carries a roller, k, atone end, as usual, and the gear l isfastened thereon, and a collar or washer, m, prevents cud motion, thegear-hub and collar m being on opposite sides ofthe bearing n.

.The bearing a is attached to the case d by a bolt or pin, 2, thatpasses through the same about midway between the shafts c and h, andhence is about in line with the point of contact of the rollers k and b,so that the said part of the roller k may lift vertically, or nearly so,when the outer end of the shaft h is raised, instead of swingingoutwardly, as usual in the machines heretofore made, with the trunnionsor axis of motion in line with the center of the shaft- 71 at the backbearing.

The opening in the case d for the bearing n is of g nearly the same sizeand shape as said bearing, so as to allow the bearing to swing on thepin 2bult exclude dust and dirt. l

The case l is made of a size and shape to contain the shafts, gearing,85e.; and one side of the case is formed with a door, d', hinged at 4,so as to be easily opened to give access to the parts, and allow forintroducing oil into the holes 5 of the respective journals; and whenthis door d is closed, dust and dirt are electnally excluded. A butt-onor catch at (i secures this door d'. l

The swinging end of the shaft h. passes through a box, o, that is in anopeningprovided for it in the case 1,and said box moves'up and down withthe shaft. l

[n order to close the case d at this point, I use a plate, p, that has ahole for the shaft h to pass through, and is pressed to the surface ofthe case '(1 by a spring, o'.

.In order to prevent the plate p turning around upon the shaft h, andalso to keep the box o from slipping back upon the shaft l1, I connectthe box and plate by screws, shown by dotted lines at 7 there beingsntlicient play or looseness at the heads of the screws to allow of themotion of the parts as the shaft his raised by the spring 8, ordepressed by a cam-lever acting upon the top of the box o.

The top of the box ois made as an incline, as shown in lig. 2, and Iemploy a swinging earn-stop, s, that is connected, through the. top ofthe case d, with the lever t.

It will now be evident that the movement of the lever t in one directionwill allow the roller k to be raised, in consequence of the cani-stop smoving down the incline 0f the box 0,' thus liberating the work bctweenthe rollers. The reverse movement brings the rollers upon the work, soas to hold them while thc edge of the sheet metal is't-nrned or wired.

The standard u is cast with thev case il, and has a snciently broadbase, and a bolt, t', to pass through the work-bench and be secured by anut below, thus avoiding the large moitises and holes usual forreceiving machines of this class, and supporting them upon the bench.

I claim as my invention- .`l. The case d, made in the manner specified,to receive the shafts a and h, and inclose the gearingand holesvforoiling the journals, combined with a removable door or cover, as setfort-h.

2. The box An for the shaft 71, fitted to move upon the center or pin 2,located about midway between the shafts a and h, for the purposes and asset forth.

3. The box o of the shaft h, litted to slide in the cose (I, and madewith an inclined upper edge, so as the case d, with a bolt projectingdown to receive a nut, for securing the tiumans machine to the bench, asand-for the purposes set forth. Signed by me this 4th day of February,A. D. 1870.

CEAS. BROMBAGHER.

Witnesses OHAs. H. SMITH, GEO. T. PINCKNEY.

